IB

n. aforementioned, in the same place (Latin term used in footnotes and bibliographies to indicate that a citation comes from the same source as the previous)

IB or ib may stand for
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Adverb
1. in the same place (used when citing a reference)
(synonym) ibid., ibidem

An individual or firm who can perform all the functions of a broker except one. An IB is not permitted to accept money, securities, or property from a customer. An IB must be registered with the CFTC, and conduct its business through an FCM on a fully disclosed basis.

International Bureau - the secretariat of the WIPO which, among other functions, centralizes information of various kinds relating to the protection of intellectual property.

Context: Patent